Phenological study of congeneric Myrcia species and Clethra scabra in wetland and drained habitats in a Montane Forest.

Abstract

Although important, phenological studies comparing congeneric species or the same species growing in diferent habitats are still scarce for the tropics. Herein, we integrate phylogeny, ecology and biometeorology to verify whether the phenophases of congeneric species Myrcia laruotteana and Myrcia amazonica or Clethra scabra difer when their populations inhabit wetland and drained habitats and to determine what abiotic factors afect the vegetative and reproductive phenophases of these species in distinct habitat patches. We collected data on phenological events of 80 trees for 1 year in Itacolomi State Park, Brazil, and related them to abiotic local factors. Contrary to our expectation, the phenophases of the congeneric species did not difer between habitats, but the reproductive phenophases of C. scabra did and was greater in drained soil. Phenophases of C. scabra were afected by the depth of the water table and maximum temperature in the wetland soil. Insolation, precipitation, maximum temperature and relative humidity infuenced Myrcia and Clethra in the drained soil. The differences between C. scabra populations suggest that this species is phenotypically plastic and can present distinct phenophases depending on the habitat it inhabits. On the other hand, the congeneric Myrcia species may have similar phenophases in distinct habitats because of their shared similarities during their evolution. This study provides a better understanding of the ecology of these species and their adaptations to diferent abiotic conditions. Data of this nature are important in a changing world and can inform strategies for adaptive management.